private bool ScaleDown(int applicationId, string tenantName, int scale)
{
Log.Info(this, "Scaling down application: " + applicationId);
LbGetApplicationInstancesRequest request_ = new LbGetApplicationInstancesRequest(Settings.Credentials);
request_.NodeId = -1;
request_.ApplicationId = applicationId;
LbGetApplicationInstancesResponse response_ = EndPoints.GetLbApplicationGridService().GetApplicationInstances(request_);
List<ApplicationInstance> list = response_.ApplicationInstances.OrderBy(x => x.Id).ToList();
if ((list != null) && (list.Count >= scale))
{
// Stop idling application instances
List<ApplicationInstance> idlingInstances = list.FindAll(x => x.RequestCount == 0);
// Keep one instance alive
if (idlingInstances.Count == list.Count)
idlingInstances.Remove(idlingInstances.Last());
if (idlingInstances.Count > 0)
{
foreach (ApplicationInstance instance in idlingInstances)
{
ApStopApplicationInstanceRequest request = new ApStopApplicationInstanceRequest(Settings.Credentials);
request.NodeId = instance.NodeId;
request.ApplicationId = instance.ApplicationId;
request.InstanceId = instance.Id;
GetApDashboardService().StopApplicationInstance(request);
}
return true;
}
}
return false;
}
public ApStopApplicationInstanceResponse StopApplicationInstance(ApStopApplicationInstanceRequest request)
{
Log.Info(this, "StopApplicationInstance()");
try
{
Authenticate(request);
ApStopApplicationInstanceResponse response = new ApStopApplicationInstanceResponse();
Node node = Database.GetInstance().Nodes.Where(x => x.Id == request.NodeId).FirstOrDefault();
if (node != null)
{
// Stop application instance in the node
NcStopApplicationRequest ncRequest = new NcStopApplicationRequest(Credentials);
ncRequest.ApplicationId = request.ApplicationId;
ncRequest.InstanceId = request.InstanceId;
EndPoints.GetNcApplicationGridService(node).StopApplicationInstance(ncRequest);
// Update routing mesh in the load balancer
LbRemoveApplicationInstanceRequest request_ = new LbRemoveApplicationInstanceRequest(Credentials);
request_.NodeId = request.NodeId;
request_.ApplicationId = request.ApplicationId;
request_.InstanceId = request.InstanceId;
EndPoints.GetLbApplicationGridService().RemoveApplicationInstances(request_);
}
else
{
throw new MonoscapeException("Node not found");
}
return response;
}
catch (Exception e)
{
Log.Error(this, e);
throw e;
}
}
//
// GET: /applicationgrid/stopapplicationinstance
public ActionResult StopApplicationInstance(int nodeId, int applicationId, int instanceId)
{
try
{
ApStopApplicationInstanceRequest request = new ApStopApplicationInstanceRequest(Credentials);
request.NodeId = nodeId;
request.ApplicationId = applicationId;
request.InstanceId = instanceId;
EndPoints.ApDashboardService.StopApplicationInstance(request);
return RedirectToAction("ApplicationInstances");
}
catch (Exception e)
{
return ShowError(e);
}
}